What I'm looking for:

• lightweight (non IDE) program for linux that manage the tasks listed below.
• modern GUI program - I want to use mouse, drag-n-drop...

The features from notepad++ I want to use in the desired linux program (from the most important ones):

• multiple files open in tabs
• syntax highlighting for most languages
• toggle comment for most languages
• regex find and replace
• reload prompt if the file has been modified outside the program
• autosave
• find and replace in all opened files or all files in directory
• simple autocomplete (based on other text in the same file)
• hex editor

Is there any program on linux that match these requirements, or nearly all of them?